Cheap Flights from Seattle to Adelaide from US$1,011

Frequently Asked Questions

• What are the cheapest flights from Seattle to Adelaide (SEA-ADL)?

  Based on Trip.com data, Qatar Airways offers one-way fares as low as US$1,011 on Cheapest nonstop routes (e.g. SEA to ADL on Mon, Aug 31), while Qatar Airways offers Cheapest nonstop round-trips from US$1,267 departing on Wed, Sep 9 and returning on Wed, Sep 16.

• When is the best time to book flights from Seattle to Adelaide?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Adelaide is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Seattle to Adelaide?

  To find best deals on flights from Seattle to Adelaide, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Aug 31, with one-way flights priced at just US$1,011.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Qatar Airways.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Adelaide travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Seattle (SEA) to Adelaide (ADL) the cheapest?

  The cheapest months to fly from Seattle to Adelaide is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Seattle to Adelaide on?

  After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Seattle to Adelaide on August 20, 2026 with Qatar Airways, with prices starting at US$1,331.

• Is there any time difference between Seattle and Adelaide?

  The time difference between Adelaide and Seattle is 17h.

• How do I change or cancel my ticket from Seattle to Adelaide?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Seattle to Adelaide?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Seattle to Adelaide is US$1,436. Fares vary by travel date, airline and availability.

• How do I book flights from Seattle to Adelaide on Trip.com?

  Enter Seattle and Adelaide, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.